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And anyone wanting data integrity is going to be running raid as there isn't anything saying that a whole drive couldn't go kaput. noone will rely on the FS alone to save them...

The point isn't really for the FS alone to save you from a hardware failure, it's that there are failure modes in which you won't even know that a failure happened unless something is hashing the data on a regular basis. It doesn't have to be the filesystem, but that's arguably a reasonable place to do it (and ZFS is really more like a combination of filesystem/volume management/softraid than just a FS anyway).

I'm confused X.x 48 cores is trivial these days 12 cores per die is off the shelf stuff... and quad socket mobos aren't that uncommon. I even know a fellow that has at 32 core box with quad channel ram on a relativly light budget as well its quite a beast for a serverish/desktop.

WHERE????!
Is filesystem DESIGNED to withstand all those errors? Hell, NO.
It is like blaming Joe from Los Angeles in Fukushima crisis! He is american, and americans delivered parts to Nippon, so he is responsible for nuclear meltdown! He is NOT.
What is Joe responsible? To support his family and do it well! There is no point in giving every single Joe nuclear physician education to control the reactor either!

Projected to this "analysis", the file system should only do what filesystem should do - and do it well.

Crazycheese, your poor grammar leads me to think that you are from a non-english speaking region. I'm from australia, but i'm aware that in america (as per your example) there is legal precedent to indicate that if you develop parts for a purpose (such as a nuclear reactor) and they have a failure, then you can be at fault for negligence. From memory the precedent was kind-of set by a case involving buick and some wheel manufacturer.

Also, it might be useful for you to think about what a filesystem is. It's a component that is used by the computer to reliably read and write information in a persistent way. Hardware failures might cause the filesystem to work incorrectly, but the file-system can very feasibly be improved to get around a lot of problems.